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问题

@DataSourceDefinition提供url属性，但将被​​忽略。如果 url 设置为，将建立到jdbc:postgres://database:5432/demo的连接。通过将它们设置为,和直接localhost:5432设置，相同的设置效果很好。serverNameportNumberdatabaseName

演示

可以在https://github.com/ThomasPr/DataSourceDefinition找到一个说明此行为的小型演示项目

细节

工作示例✅</h3>

属性serverName,portNumber和databaseName是单独设置的。database:5432将成功建立与 postgres 的连接。

@DataSourceDefinition(
    name = "java:global/jdbc/DemoDataSource",
    className = "org.postgresql.ds.PGSimpleDataSource",
    serverName = "database",  // set the property
    portNumber = 5432,        // set the property
    databaseName = "demo",    // set the property
    user = "demo",
    password = "demo")

失败的例子❌</h3>

将再次使用工作示例中的相同设置，但这次只设置url属性。结果是连接尝试localhost:5432而不是database:5432

@DataSourceDefinition(
    name = "java:global/jdbc/DemoDataSource",
    className = "org.postgresql.ds.PGSimpleDataSource",
    url = "jdbc:postgresql://database:5432/demo",  // only use url, but no serverName, portNumber or databaseName
    user = "demo",
    password = "demo")

奇怪的例子

与失败示例中一样使用相同的 url 设置。但是serverName,portNumber和databaseName被设置为空值。很奇怪：这一次连接database:5432成功了。与失败示例的唯一区别是提到的三个空值。

@DataSourceDefinition(
    name = "java:global/jdbc/DemoDataSource",
    className = "org.postgresql.ds.PGSimpleDataSource",
    url = "jdbc:postgresql://database:5432/demo",  // use the url to configure connection properties
    user = "demo",
    password = "demo",
    serverName = "",    // set it to an empty value
    portNumber = -1,    // set it to an empty value
    databaseName = "")  // set it to an empty value

例外

在Payara启动过程中，失败的情况下会出现如下异常：

microservice_1  | [2019-12-13T14:29:00.071+0000] [] [SEVERE] [] [org.eclipse.persistence.session./file:/tmp/payaramicro-rt7729847129244438567tmp/applications/ROOT/WEB-INF/classes/_demo.ejb] [tid: _ThreadID=1 _ThreadName=main] [timeMillis: 1576247340071] [levelValue: 1000] [[
microservice_1  |
microservice_1  | Local Exception Stack:
microservice_1  | Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.7.4.payara-p2): org.eclipse.persistence.exceptions.DatabaseException
microservice_1  | Internal Exception: java.sql.SQLException: Error in allocating a connection. Cause: Connection could not be allocated because: Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.
microservice_1  | Error Code: 0
microservice_1  |   at org.eclipse.persistence.exceptions.DatabaseException.sqlException(DatabaseException.java:318)
microservice_1  |   at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:150)
microservice_1  |   at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:172)
microservice_1  |   at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.setOrDetectDatasource(DatabaseSessionImpl.java:233)
microservice_1  |   at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:815)
...
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